1 / 19

MEASUREMENT The Metric System and Conversions

MEASUREMENT The Metric System and Conversions. Number vs. Quantity. Quantity - number + unit. UNITS MATTER!!. The Metric System. Easier to use because it is based on powers of 10. A metric unit has two parts: A prefix and a base unit Example cm, mL, mg

aleron
Télécharger la présentation

MEASUREMENT The Metric System and Conversions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MEASUREMENTThe Metric System and Conversions

  2. Number vs. Quantity • Quantity - number + unit UNITS MATTER!!

  3. The Metric System Easier to use because it is based on powers of 10. A metric unit has two parts: A prefix and a base unit Example cm, mL, mg The prefix tells you how many times to divide or multiply by 10 KHD DCM King (kilo=1000) Drinking (deci=1/10) Henry (Hecta =100) Chocolate (centi=1/100) Died ( Deka =10) Milk (Milli=1/1000)

  4. Some Base Units Length - meter(m) - more than a yard Mass - grams(g) - about a raisin Volume - Liter(L) - half of a two liter bottle

  5. Some Prefixes kilo 1 km = 1000 m Hecto 1 hm = 100 m Deka 1 dkm = 10 m deci 1 dm = .1 m centi 1 cm = .01 m milli 1 mm = .001 m Micro 1 µm = .000001 m Nano 1 nm = .000000001 m

  6. Dimensional Analysis • The “Factor-Label” Method • Units, or “labels” are canceled, or “factored” out

  7. Dimensional Analysis • Steps: 1. Identify starting & ending units. 2. Line up conversion factors so units cancel. 3. Multiply all top numbers & divide by each bottom number. 4. Check units & answer.

  8. Conversion Factors Conversion factor- a fraction based on a definition and equal to 1 Example: 1 cm = 0.01 m Conversion factors possible: 1 cm0.01 m0.01 m OR 1 cm

  9. Example 1 • Convert 77 kg to grams

  10. Example 2 • Convert .0087 mL to L

  11. Example 3 • Convert 12 yds to ft

  12. Example 4 • Convert 32.4 cm to yards

  13. Example 5 • Convert 50 mm to km

  14. Example 6 • Convert 4.5 x 10-5 yr to min

  15. Multi Dimension Conversions • Remember…….. • 1 dimension at a time!

  16. Example 1 • Convert 17.2 mi/hr to m/s

  17. Example 2 • Convert 44 cm3 to in3

  18. Example 3 • Convert 4.5 lb/ft3 to g/cm3

  19. Questions? • “The ultimate measure of a person is not where they stand in moments of comfort and convenience, but where the stand in times of challenge and controversy.”

More Related